-al a-a a-b a-t a-z aaa aab aal aat aaz ab- aba abb abl abt abz al- ala alb all alt alz at- ata atb atl att atz az- aza azb azt azz baa bab bal bat baz bba bbb bbl bbt bla blb bll blt blz bta btb btl btt btz bza bzz la- laa lab lal lat laz lba lbb lbl lbt lla llb lll llt llz lta ltb ltl ltt ltz taa tab tal tat taz tba tbb tbl tbt tbz tla tll tlt tlz tta ttb ttl ttt tza zaa zab zat zaz zbb zbl zbt zla zlt zta ztl zzt zzz